It's 7:30 p.m., the sun has been down for about an hour, and I'm getting ready to plunge into the inky black water of the Great Barrier Reef. Below me is a group of hungry whitetip reef sharks, ...

The beautiful, electric blue glowing water can be tough to track in nature – usually lighting up far past bedtime and elusively moving from beach to beach with ocean currents. Other times, the ...